"It was not pleasant, I'll say that," Gyllenhaal told me at last night's L.A. Live premiere of the movie (in theaters on Friday). "Thousands of volts of electricity going through your body in a very short amount of time is not a lot of fun."

So why'd they do it?

"They said they do it to the training officers," costar America Ferrera said. "But no one made me do it. I am the one who succumbed to the peer pressure because everyone else was doing it. It's not my proudest moment, but we all have the shared experience and I guess it bonded us."